# You're a double negative

Given that $$m$$ and $$n$$ are integers then $$mn(m^{80} - n^{80})$$ is always divisible by the positive integer $$N$$. Find the maximum value of $$N$$.

Bonus question: Generalize this for $$mn(m^{L} - n^L)$$ for some whole number $$L$$.

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